Charles Allen Henderson

US Patent:

41461754, Mar 27, 1979

Filed:

Oct 3, 1977

Appl. No.:

5/838732

Inventors:

Henry A. Daboub - Dallas TX
Chris A. Balthrop - Bedford TX
Charles R. Henderson - Grand Prairie TX

Assignee:

E-Systems, Inc. - Dallas TX

International Classification:

G06K 714
G06K 1906

US Classification:

235462

Abstract:

Bar codes imprinted or otherwise applied to an object are read and decoded by focusing light reflected from the code by means of an object lens to a light responsive transducer. Electrical signals produced by the transducer are correlated and converted from a trinary code format into a binary code format. The trinary code utilizes bars and half bars made up of segments in one or more of four quadrants to represent a decimal equivalent number. This trinary code is applied to a converter where logic converts the trinary signals into equivalent binary signals which are then translated from a serial format into a parallel format for further processing by conventional binary code processors.

US Patent:

40925250, May 30, 1978

Filed:

May 6, 1976

Appl. No.:

5/683981

Inventors:

Henry A. Daboub - Dallas TX
Charles R. Henderson - Grand Prairie TX
Chris A. Balthrop - Bedford TX

Assignee:

E-Systems, Inc. - Dallas TX

International Classification:

G06K 710
G06K 900

US Classification:

235463

Abstract:

Bar codes imprinted or otherwise applied to an object are read and decoded by focusing light reflected from the code by means of an objective lens to an image intensifier tube. Light energy reflected from the code impinges on the photo cathode of the image intensifier tube thereby causing an electron beam to generate a display on a phosphor screen with the electron beam deflected to center the code image on the phosphor screen. A fiber optic array channels light from the phosphor screen to an array of zones of photo sensors each zone having an output coupled to a correlation circuit. Output voltages from the correlation circuits are simultaneously coupled to acquisition, tracking and reading logic. Initially, upon detecting the presence of a code on an object, the acquisition and tracking logic responds thereto to produce deflection voltages to the image intensifier tube to provide centering on the phosphor screen. Outputs from the correlation circuits are coupled to reading logic to generate an output waveform representative of the bar coded data.